I talk to the UPS and Fedex guys at my family business on regular basis. UPS drivers union, Fedex not, anything other than Fedex express are contract employees. Many companies we deal with ship via Fedex contract worker services (called Fedex HOME for consumers), we have great amount of packages delivered via this service on nearly daily basis. These contract workers need to hustle to make any money, none last more than a few months. UPS guy much less harried, he even gabs with me from time to time, still, even he sometimes bitches about his working conditions. USPS around me a disaster, they churn workers as much as Fedex. And Amazon, those guys just like Fedex contract workers. DHL seems most stable to me, have some items waiting for right at the moment. We'll see how it goes.
Shipping, logistics a mess right now, just in time business model not looking so good right now. I don't know for sure, but we may be transitioning into demand world vs. supply world. Workforce participation rates in demand countries at all time low levels (exception of depression), baby boomers retiring with wealth to spend, younger generations both too small and particular about jobs to service us old fogies. And don't think this is going to change anytime soon, USA will be demand country for the forseeable future. We've not been supply country for some time, and it appears we are transitioning into short supply for service workers.